Sungyeol had loved a girl since they first met. He cared for her more than anything. Since then, she's been everything to him. But suddenly one day, he has to leave. He didn't want to let her know the reason for it and he didn't want her to worry just about such reasons. He decides to break up with her later on and leaves her crying at where she was. What is the reason for his sudden actions? Why change his character only for that? 

Characters:

Sungyeol as Lee Heesung

Bo Young as Park Ga Young